Live Insights surfaces signals based on per-service telemetry.

A few reasons a service might not appear:

No telemetry is being received — services without recent traces, logs, or metrics don't appear
No signals above threshold — services that are healthy don't appear in the rail
Sampling effects — for very low-volume services, individual incidents may not exceed the baseline-ratio threshold for severity

To verify telemetry is flowing for a specific service, check the Service Catalog directly.

Live Insights Not Showing Services

Further Reading